The 
Tokens tab of the Activity Proxy Property step lets you create a token for the property you selected in the left-hand column. The token will have the same value as the property when the activity runs.
To create a property token
- Select the Make this property available as a token to other activities checkbox
- Type a name for the token in the text box next to Token Name. This name will appear in the token menu and will be combined with the activity's name as part of the token's syntax.
Example: If you have an activity named MyCustomActivity and create a token named User Input in this tab, the token's syntax will be: %(MyCustomActivity_User Input).